One who is always complaining, always negative, is never pleased. Has the desire to punch people, throw people off of balconies and shove fingers into their eyes with the excuse of "he who hits you, loves you"

Guy: Laiaaaan, hey how are you?
Laian: back off or i'll punch you.
Guy: i was just ask-
Laian: that's it! we're off to the balcony.